My Dell PowerEdge server has 24GB memory and 6GB swap. It has some VirtualBox vms （virtual machines), one vm is assigned 10GB memory and no swap. Right now the vm is slow, the vm's vmstat output is:
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I'm renting a virtual CentOS based server where I have about 5 active sites running. Several months ago I noticed a significant performance degradation in how my sites are running.
First symptom was ...

I ran vmstat -D for 1s interval and take the different of milli reading/writing between two interval. Then I start copy a file to test.
bytes write per secs is 23.9M/s, and mili writing is 7244.
As ...

I want to write a script that will kill my processes when my machine is doing "too much" swapping of process memory from disk to memory.
What is the best way to determine that? I saw top has %wa and ...

I'm running a quite heavy number crunching thing on a few 4 core servers, all running Ubuntu Precise Pangolin LTS 64 bit, in the cloud (so I suppose in a virtualized environment).
To monitor the cpu ...

I don't know what to do about high bo values is vmtstat.
bi is 0 but bo is about 6000. So I don't know what that means and what to do. The application running on server is hanging. I don't know if it ...

As far as I know, the load average in top is the numbers of precess(threads) in running or uninterrupted sleep status, So it should be equal to (procs-r +1 )+ procs-b in vmstat, but in practice, this ...

I have a Xen Dom0 (3.2) with a bunch of domUs (paravirt). DomU VBDs are on local LVM volumes. Now I want to get backups of the LVM volumes using snapshots. I use rsync ioniced to idle (ionice -c3).
I ...

vmstat provides a counter cs for context switch. As this explains, the context switch can be from one process to another , kernel to user or due to a interrupt being fired. Does the cs give a total of ...

I am confused with the CPU idle time is set to 99. Does this mean the CPU is idle not doing anything for 99% of the time?
#vmstate
procs -----------memory---------- ---swap-- -----io---- --system-- ...

Im trying to automate a long list of database experiments. I would like to save vmstat output while specific parts of the experiments are running.
Does something exist along the lines of time(1) or ...

I am running into a scenario where I'm seeing a high server load (sometimes upwards of 20 or 30) and a very low CPU usage (98% idle). I'm wondering if these wait states are coming as part of an NFS ...

What are useful rule-of-thumbs with regard to interpreting non-zero vmstat "si/so" values? When are the values "okay" and when are they an indication of that the memory situation is problematic?
The ...

Is there a way to run the VMSTAT command (or something like it) and have a timestamp be included in the line? I know that I can pipe the output of the command and manipulate the results, but if I do ...

We have a proprietry system, which runs on Tru64 Unix.
It is a terminal based system.
We are able to use the login 'vmstat' to the system which brings up a vmstat-like view.
However, the information ...

I have a production server that is showing a very large number of forks when running vmstat -f. Any suggestions on steps that could be used to help find out what the origin of the forks are?
vmstat ...